Exam Question
Find the length of manganese wire required to make a 15.7 ohm resistor, if the diameter is 0.315mm and the resistivity are 407 µΩ (16)
Class 4 (4th Engineer)
MET
📅 Jul 2023
Reference Answer
### Fundamental Principle
The electrical resistance of a uniform conductor is directly proportional to its length and its resistivity, and inversely proportional to its cross-sectional area. This relationship is fundamental to understanding how resistors are constructed and how their properties are determined by their material and dimensions.
### Governing Formula
The relationship is expressed by the formula:
The electrical resistance of a uniform conductor is directly proportional to its length and its resistivity, and inversely proportional to its cross-sectional area. This relationship is fundamental to understanding how resistors are constructed and how their properties are determined by their material and dimensions.
### Governing Formula
The relationship is expressed by the formula:
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